43


Ultrapure Water for Cleaner Cavities


Elga Process Water is helping the STFC Daresbury Laboratory’s Accelerator Science and Technology Centre (ASTeC) to provide cutting edge research facilities. Particle accelerators depend on ‘radio frequency cavities’, which add energy to accelerate electrons up to light speed, and ASTeC has a cavity processing facility. “Cleaning and processing these RF cavities needs ultrapure water”, said ASTeC’s Andy Goulden, “because any trace of contamination will reduce the efficiency resulting in big energy losses. So we specified 18.2MΩ.cm resistivity and 10ppb TOC.”


To meet this demanding specification, ELGA Process Water installed a water treatment system consisting of a CENTRA with two service deionisation (SDI) cylinders. The CENTRA’s reverse osmosis module removes over 90% of dissolved minerals and over 99% of organics and bacteria from the Daresbury mains water. The resulting ‘permeate’ is delivered into the CENTRA’s integral 350-litre storage tank from which the treated water is continuously pumped through the two SDI cylinders operating in series. This ‘polishes’ the water to the required 18.2MW.cm resistivity. Water quality is monitored between the two cylinders and, as soon as there is any deterioration, the cylinders are exchanged for fresh ones. The polished water then flows through a UV disinfection unit with a final microfilter to control microbiological growth before being drawn off for use or returned to the CENTRA’s tank.


Circle no. 432


ProfiLine 3000: New Single-Parameter Handhelds from WTW


WQL-pH – New Data Logger from WTW


Monitoring of water resources has become a global challenge with high priority. Therefore innovative measuring technology is essential. The multifunctional pH data logger WQL-pH from WTW with a diameter of only 25 mm is made to meet all requirements of continuous long-term pH measurement and data logging. The logger is usable in ground and surface water as well as in drinking and waste water.


Key features • Flash memory for up to 600.000 data records. Each data record contains pH, temperature, date and ID-number • USB connection for fast data transfer to PC measuring operation • High quality lithium battery and intelligent energy management for longer battery lifetime • New pH Electrode SensoLyt®


WQL with polymer reference electrolyte is extremely stable and allows a precise


measurement over a long period of time. • Robust IP 68 design: Pressure- (10 bar) and water-resistant (100 m depth) • User-friendly interface allows easy and fast access to all important functions and settings


Circle no. 436


Pumps Help Oceanographic Research


The Japan Agency for Marine-Earth Science and Technology (JAMSTEC) has developed a miniaturied observation device to measure carbon dioxide (CO2) in seawater, relying on Tecan’s Cavro®


wide range of basic marine-related research, including collection and dissemination of information that helps to understand changes in the earth’s environment. It is one of the activities of the Japan EOS Promotion Programme, funded by MEXT, Japan.


“It is necessary to monitor CO2 concentrations in order to predict future climate change,” explained Dr Yoshiyuki Nakano, Research Scientist at JAMSTEC’s Mutsu Institute for Oceanography in Aomori, Japan. “We developed a device that calculates the CO2 concentration in seawater by analysing a pH indicator solution, using two Cavro XCalibur Pumps to aspirate and mix pure water and


concentrated pH indicator for each measurement. The volumes of indicator and water used are critical for reliable results, and the accuracy of the Cavro XCalibur Pump allows us to achieve exactly the concentration we aim for, while the pump’s broad selectable volume range allows us to choose the exact concentration we want.”


“We also chose the Cavro XCalibur Pump because an important design goal was to make the CO2 sensor small and light; the pump also offered high accuracy and was capable of maintenance-free operation for long periods,” added Dr Nakano.


Circle no. 433 The Complete Home Water Quality Test Kit


Industrial Test Systems, Inc has unveiled the redesigned Complete Home Water Quality Test Kit, the first water quality test kit that lives up to its name. The Complete Home Water Quality Test Kit (481199) tests 13 common water parameters valued at over $350 (approximate laboratory costs). The Kit uses safe and accurate recognised test methods any homeowner can use to test their water quality.


This newly redesigned Water Quality Test Kit includes tests for bacteria, nitrates, nitrites, hydrogen sulphide, total hardness, total alkalinity, total chlorine, free chlorine, chloride, copper, sulphate, Iron and pH. It gives rapid, comprehensive results that help to ensure safe drinking water without sacrificing cost. The instructions are clear, no harsh chemicals are used and no expensive equipment is required.


Circle no. 434 ADVERTORIAL XCalibur Pump for accurate automated pipetting. Jamstec is involved in a


WTW GmbH proudly announces their new ProfiLine 3000 series of single parameter handheld instruments. All models have a rugged waterproof housing with IP 66/67 protection class. A separate battery compartment allows easy exchange of batteries or the use of rechargeable batteries. A technical highlight is the special silicone keypad with sealed surface and the feeling of ‘real’ keys. It provides an excellent operation and is easy to clean. The instruments have continuous operation times of up to 2500 h with one battery pack (4 x 1.5 V AA).


Three model lines are offered:


• The 3110 Series for pH or conductivity measurement are functional and easy-to-use handhelds for standard measurements.


• The 3210 Series for pH, D.O. or conductivity measurement has a backlit graphical display, a plain text menu and a special CMC function to ensure that the measurement is taken within the calibration range. The series also has enhanced measurement capabilities.


• The 3310 Series for pH, D.O. or conductivity measurement is a true highlight: An automatic datalogger with memory for 5000 records and a 100% waterproof USB interface make them perfect for long-term recording in the field and for fast data transfer to a laptop or PC.


Circle no. 435 Circle no. 437 Spotlight


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